Crop Water Productivity (CWP)

Computes crop water productivity as the ratio of yield to total evapotranspiration, analogous to the "more crop per drop" concept.

crop_water_productivity(yield, et, verbose = TRUE)

Arguments

yield

Numeric vector. Crop yield (kg/ha).

et

Numeric vector. Seasonal evapotranspiration (mm).

verbose

Logical. If TRUE, prints informational messages. Default TRUE.

Value

Numeric vector. Crop water productivity (kg/m3).

Details

$$CWP = \frac{Y}{ET \times 10}$$ The factor 10 converts mm to m3/ha.

References

Zwart, S.J. & Bastiaanssen, W.G.M. (2004). Review of measured crop water productivity values for irrigated wheat, rice, cotton and maize. Agricultural Water Management, 69(2), 115-133. doi:10.1016/j.agwat.2004.04.007

Examples

crop_water_productivity(yield = 4500, et = 400)
#> Crop water productivity computed (kg/m3).
#> [1] 1.125